Azido­(benzoyl­acetonato-κ2 O,O′)[1-phenyl-3-(2-pyridylmethyl­imino)but-1-en-1-olato-κ3 N,N′,O]cobalt(III)

In the title complex, [Co(C16H15N2O)(C10H9O2)(N3)], the CoII atom adopts an octa­hedral coordination geometry by a tridentate Schiff base, a bidentate benzoyl­acetonate and an azide ligand. The imine N atom of the tridentate ligand is trans to the benzoyl O atom of the bidentate ligand and the azide ligand is trans to the acetyl O atom of the bidentate ligand. Non-classical intra­molecular Car­yl—H⋯O hydrogen bonds are present in the structure

Bis{N′-[1-(2-pyrid­yl)ethyl­idene-κN]benzohydrazidato-κ2 N′,O}nickel(II)

In the title complex, [Ni(C14H12N3O)2], the NiII atom lies at the centre of a distorted octahedron formed by two tridentate hydrazone ligands. Inter­molecular hydrogen bonds of the type C—H⋯X (X = N, O) link the complexes into a two-dimensional network

A fourth-order Runge-Kutta (RK4) Spreadsheet Calculator For Solving A System of Two First-Order Ordinary Differential Equations Using Visual Basic (VBA) Programming

Motivated by the work of a spreadsheet solution of a system of ordinary differential equations (ODEs) using the fourth-order Runge-Kutta (RK4) method, a RK4 spreadsheet calculator for solving a system of two first-order ODEs was developed using VBA programming. The main feature of this spreadsheet calculator is to provide a user-friendly interface input form for users to insert the required information instead of the standard cells in Excel. Users are prompted step by step to give relevant information beginning from providing independent and dependent variables used in the system of ODEs. Secondly, they are required to give the interval for the independent variable, initial values for the dependent variables, a step size h and desired accuracy for computation. Thirdly, they have to enter the system of two first-order ODEs and the exact functions if it exists. The ODES and the exact function can be typed in Mathematical form. After Solve button is clicked, its calculation is automatically performed and can be recalculated for a new system once the needed information is re-entered. The attached spreadsheet calculator together with this paper would be able to assist educators in preparing their marking scheme easily and help students to verify their answers. A summative evaluation of this RK4 Spreadsheet Calculator has been conducted by involving 34 students as sample. The data was collected using questionnaire. The findings showed that majority of the students agreed that the RK4 Spreadsheet Calculator provides a learning environment that allows learners to be guided through the solution which is presented step by step

A Heteroleptic Palladium(II) Complex Containing a Bidentate Carbene/Amido Ligand and 3-(Trifluoromethyl)-5-(2-pyridyl)pyrazolate: Fast Catalyst Activation in the Heck Coupling Reaction

[[abstract]]A multicomponent reaction between PdCl2, fppzH, and [LH1H2]Cl in the presence of K2CO3 (L= bidentate amido/carbene; fppzH=3-(trifluoromethyl)-5-(2-pyridyl)pyrazole) allows the preparation of PdL(fppz) in good yield. The analogous platinumcomplex, however, needs to be prepared by a twostep procedure. The new palladium(II) and platinum(II) complexes were characterized by 1D and 2D NMR spectroscopy, X-ray crystallography, electrospray ionizationmass spectrometry, and elemental analyses.X-ray photoelectron spectroscopy indicates the high electron richness of the palladiumatoms in PdL(fppz). These palladium complexes are efficient in catalyzing Heck coupling reactions with challenging aryl halide substrates. The catalyst activation in PdL(fppz) is significantly faster than that in cis-PdL2.Amere 0.5mol%of palladiumloading is enough to afford a 82%yield of coupled product from 4-chloroanisole and styrene in 24 h

Development of a XYθ

The main purpose of this study is to develop a XYθZ 3-DOF nanopositioning stage with linear displacement amplification device. This stage is used by three groups of linear displacement amplification device to composition, and thus achieves precise XYθZ 3-DOF movement. The linear displacement amplification device makes use of a symmetrical layer mechanism, toggle amplification mechanism and parallel guiding spring to composition, and with amplification capability. Then it uses an equilateral triangle way to set the three groups of linear displacement amplification device. Overall design uses the finite element software ANSYS 12.0 to analysis the displacement, stress and dynamic response of nanopositioning stage. Experiment demonstrated takes the laser interferometer as the standard of displacement measurement. The result of experiment measurement shows that the maximum XY axis displacement and θZ rotational angle travel of the stage is 36.5 μm, 32 μm and 265 arc sec

Vimentin is a potential prognostic factor for tongue squamous cell carcinoma among five epithelial–mesenchymal transition-related proteins - Fig 2

<p>Kaplan-Meier survival curves for disease-specific survival according to (A) Snail expression status, (B) Twist expression status, (C) E-cadherin expression status, (D) N-cadherin expression status, and (E) Vimentin expression status in TSCC patients. Kaplan-Meier curves for disease-free survival according to (F) Snail expression status, (G) Twist expression status, (H) E-cadherin expression status, and (I) N-cadherin expression status.</p